One of the intricate properties of second language acquisition is that some types of grammatical feature appear to be acquired easily and in a native-like way, while others remain persistently difficult. There is much evidence related to the issue in the current empirical studies, and the issue raises an important explanatory problem for a theory…

Reviews factors influencing reversals of expectations for language-learning outcomes. This article touches on psychological and neurological data regarding individual differences in language-learning mechanisms and focuses on cross-linguistic psycholinguistic analysis that indicates that different target languages offer a wide variety of learning…